川西致密砂岩气田开发后期增压开采技术

Recovering Technique with Booster for Late Exploitation of West Sichuan Compact Sandstone Gas Field

采用ReO软件对川西致密砂岩气田气藏生产系统进行建模并进行了增压开采方案优化模拟。研究表明,新场气田以川孝161、163、156三个井区为单元进行整体增压开采,洛带气田以金堂、文安、西平三个增压站进行整体增压开采,气藏单井平均采收率可提高8.59%。整体增压开采不仅能较快收回全部投资,而且能获得较好开发效益。

Compact sandstone gas field in the West Sichuan has been exploited extensively more than nine years and has become a low pressure field. Constrained by the pipe network pressure, the production of the gas reservoir has declined rapidly and it is difficult to maintain its production steadily. In order to keep the gas reservoir＇s production steadily, based on the recoverable reserves＇ research, the paper sets up the model of the production system of the gas reservoir with the ReO software and simulates a few programs of pressure boost to the gas field. The modeling effort proves that Xinchang Gas Field divided into Chuanxiao 161, 163 and 156 well block and used gas compressor to exploit can maintain production stabilization, and that Luodai Gas Field divided into Jintang, Wenan and Xiping well block. The average recovery factor of single well will increase 8.59 percent; the gas field whole pressure boost to exploit can take back all the investment and may get favorable benefit.